After learning about the Pokemon Dream Radar I have been wondering what else could Gamefreak and Nintendo do with the 3DS hardware to make the next Pokemon experience better. Let's face it from GBA to NDS the 2 biggest things done were allowing moves to be selected by the touch screen (which can lead to some horrible mistakes) and allowing players to battle using the Wi-Fi capabilities of the NDS.
The 3DS has more features than the NDS such as Streetpass, Spotpass, Motion sensors and even better yet the Fc is set by the system (thank goodness!). How do you think these will utilized for a Pokemon game on the 3DS?
There are no motion sensors on a 3DS... unless you mean gyro controls. I don't see gyro working within the main Pokemon series. Streetpass is like having a Pokewalker, so they should bring that back.
Streetpass can be used along side with your battle team that you make in B&W. Once you set your team there thay can have a battle with each tag they make, giving them exp and maybe some special items. Also make a wish list type of trading system using SP. How it works? Kinda like the battle team. Set the pokemons that you are willing to trade and set a list of pokemons you wish to obtain. If a tag have one of the pokemons you want then a trade will be make and if you don't have the poke he wanted then a random one from your set team will be given. Rules? No legendaries and event pokemons( those are to important to waste in a random trade) the trade will not always give you what you wanted but is a fun way to trade pokemons that you really have no use for in your game.